Annealing-pot



No. 6l2,7l3. Pal'tented Oct. I8, 1898. W. P; DDULIN1& F. W. RAYMOND.

ANNEALING POT.

(Application led Jan. 29, 189B.)

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No. 6I2,7|3. Patented Oct. I8, |898.

W. P. DUULIN &. F. W. RAYMOND. ANNEALING PUT.

(Application led Jan. 29, 1898,) (Model.) 2 Sheets-Sheet 2.

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AATENT W'ILLIAM P. DOULIN AND FRANCIS W. RAYMOND, OF WHEELING, VESTVIRGINIA.

ANN EALING-POT.

SPECIFICATION forming part 0f Letters Patent NO. 612,713, dated October18, 1898.

Application iiled January 29, 1898. Serial No. 668,447. (Model.)

To all whom t may concern:

Be it known that we, WILLIAM l?. DoULIN and FRANCIS W. RAYMOND, ofWheeling, in the county of Ohio and State of West Virginia, haveinvented a new and useful Improvement in Annealing-Pots, of which thefollowing is a specification.

Our invention is an improvement inthe class of pots for annealing tinplates. `The box or pot proper commonly used for this purpose has aclosed integral or solid top; but it is open at the bottom, which restsupon a suitable fiat base having a raised peripheral flange. Inpreparing for the annealing process the tin plates are piled on suchbase and the aforesaid box or pot proper placedover them. Then the spacebetween the lower edge of the box and the flange of the base is packedwith sand to prevent access of flame to the tin plates while in theannealing-furnace and of cold or cool air in the subsequent stage whilethe plates are cooling. The pots are liable to deteriorate by theexpansion and contraction due to successive heating and cooling, thesame being often warped or twisted and cracked or broken at the corners,while their integral tops sink or become depressed more or less. Thebase on which the pot proper rests is also liable to become warped ortwisted like the latter. Our invention is designed to overcome or avoidthese objections and defects, and it is embodied in the construction andcombination of parts hereinafter described and claimed.

In the accompanying drawings, Figure lis a side view of our improvedannealing-pot. Fig. 2 is a vertical section on line 2 2 of Fig.

l. Fig. 3 is a central longitudinal section.

Fig. .tis a bottom plan view of the removable cover. Fig. 5 is a planview of the pot. Fig. 6 is an enlarged plan view of a portion of theremovable cover. Fig. 7 is a perspective view of the brace constitutinga portion of the cover. Fig. 8 is a perspective view of the detachableflat sections of the cover.

The rectangular body A of our improved box or pot proper is open at thetop as well as the bottom instead of being closed at the top, as usualheretofore. At a point removed from the upper and lower edges, inpractice about two inches from said edges,

we provide the body A with two interior flanges or ledges l, Figs. 2 and8, and on whichever flange is uppermost we support a removabletop orcover B, which fits loosely into the body A. The said cover B isconstructed of four flat sections 2 and 2, Fig. S, and an archedcruciform brace C. The inner edges of the side sections 2 are adapted tofit under flanges 3, formed on the corresponding edges of the other orend sections 2, as shown in Fig. 6. The side sections 2 are providedwith flanged or grooved blocks G, which' are arranged on the upper sideof said sections and located at their inner angles. The brace C has acentral pendent dovetail portion 5, Fig. 7, which is in the nature of ablock provided with side flanges adapted to fit in the longitudinalgrooves of the blocks 6 of sections 2.

When the pairs of sections 2 and 2 are adjusted together, asv shown inFigs.` 4, 5, and 6, the brace O may be applied thereto by sliding thefianged block 5 into the space between the opposite grooved blocks ofsections 2, as shown in Fig. 2, and when the brace is properly adjustedthe enlarged ends of its arms 4 bear upon the flanges 3 of the endsections 2, as shown in Figs. 2, 3, and 5, and thus the severaldetachable parts composing` the cover are all held firmly together.

We also employ a removable bottom plate B', Figs. 2 and 3, for the potproper, A, which bottom plate B is constructed solid or in one pieceinstead of several. It rests on the raised center piece 7 of theremovable bottom plate D of the flanged base-frame D. We propose toreverse this bottom plate B as occasion may require in order to preventor remove a serious depression, warp, or twist in the same.

In practice the top B is placed in the potbody A after the latter hasbeen placed over the pile of tin plates resting on the false bottomplate B', which in turn rests on the removable bottom plate D of thebase-frame D.

When the pot is charged into the furnace, it is covered by or immersedin sand to the depth of about five inches, and hence the llame strikesonly the top and upper portion of the same. When one edge of the bodyAisburned so as to be no longer usable, the body is reversed or turnedupside down,the bottom edge IOO of flame and air to the interior of thepot, but

at the saine time it provides for escape, through the sand on the lid B,of the steam generated from the moisture adhering to the tin plates asthey come Wet from the picklin gbath, which is an important advantage.

The false bottom plate B is also reversible, like the pot-body A, andhence when it becomes bent or curved by effect of heat and Weight of thesuperimposed pack of tin plates it is turned over, so that the upperbecomes the under side. The bottom plate D' of the base D is alsoreversible in the same Way as the pot bottom plate B' and ior the samereason.

By thus constructing the pot in detachable independent sections or partsexpansion and contraction are provided for or neutralized in suclimanner that injurious or destructive twistin and cracking arepractically prevented.

The body A of the pot is provided with hooks 8 on the side and near theedge, as shown in Figs. I and 2, which serve as handles-in lifting thepart A oi't of the base D.

What We claim is I. The combinationnvith the enlarged baseframe D,having an interior ledge, the false bottom plate D supported thereon,and having a raised center portion, the body of the pot, adapted to beset on such false bottom, and itself having a bottom plate B', whichiits Within it, and is supported upon the aforesaid raised centerportion of the false bottom plate, as shown and described.

2. The combination with the body of the annealing-pot, having theinterior flange located near its edge, of the removable top cornposed oisections suitably connected, and an archedl top brace having a dovetailslide detachably connected with tWo of said sections, as shown anddescribed.

3. The combination with the body of the annealing-pot, having theinterior iiange located near its edge, of the removable top composedA ofsections suitably connected, and an arched top brace having a dovetailslide Which detachably engages grooved blocks secured oppositely onopposite sections, as shown and described.

WILLIAM P. DOULIN. FRANCIS W. RAYMOND. Witnesses OnLoFF L. ZANE, SAMUELMnvnns.

